An injection pen solution transfer apparatus and method

Details An injection pen solution transfer apparatus and method An injection pen solution transfer apparatus and method

A - Human Necessities

61

M

A61M 5/24 (2006.01) A61J 1/00 (2006.01) A61M 5/28 (2006.01) A61M 5/315 (2006.01)

Patent

CA 2175573

An injection pen apparatus (30) for medicament injection including a medicament cartridge assembly (31) formed to receive and contain a medicament therein. A holding sleeve (34) is provided which is dimensioned to receive the medicament cartridge assembly (31) therein which mates with a solution transfer device (35) including an axially movable displacement rod (36). The injection pen apparatus (30) further includes a coupling mechanism (37) removably coupling the solution transfer device (35) to both a plunger (32), slidably movable in the cartridge (33), and to the holding sleeve (34). A sleeve mounting assembly (40) of the coupling mechanism (37) removably mounts the coupling mechanism to the holding sleeve (34). A locking device (41) is included which is formed and dimensioned to require joining of the displacement rod (36) relative the sleeve mounting assembly (40) after uncloupling of the rod from the plunger (32) and before uncoupling of a remainder of the solution transfer device (35) from the holding sleeve (34).

L'invention se rapporte à un appareil se présentant sous forme de stylo d'injection (30) destiné à injecter un médicament et comprenant un ensemble cartouche de médicament (31) conçu pour recevoir et contenir un médicament. Un manchon de retenue (34) se trouvant dans cet appareil est dimensionné de façon à recevoir l'ensemble cartouche de médicament (31) qui s'accouple avec un dispositif de transfert de solution (35) comportant une tige à déplacement axial (36). L'appareil se présentant sous forme de stylo d'injection (30) comprend également un mécanisme d'accouplement (37) reliant de manière amovible le dispositif de transfert de solution (35) à un piston plongeur (32), qui peut coulisser dans la cartouche (33), et au manchon de retenue (34). Un ensemble de fixation du manchon (40) fixe de manière libérable le mécanisme d'accouplement (37) au manchon de retenue (34). Un dispositif de verrouillage (41) est inclu dans l'appareil et est formé et dimensionné de façon à faire la jonction de la tige de déplacement (36) par rapport à l'ensemble de fixation du manchon (40) après désaccouplement de la tige du plongeur (32) et avant désacouplement d'une partie restante du dispositif de transfert de solution (35) du manchon de retenue (34).

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